Mazda CX-30 2019–2024 — technical service bulletin
Bulletin 04-001-24 · NHTSA communication 10252502 · issued Mar 4, 2024
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2019–2024
model years
13
vehicle entries
Official summary
Symptom 1: Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate. Symptom 2: Some vehicles may exhibit a squeal noise from the rear brakes when braking lightly while driving at a slow speed. The squeal noise is caused by the disk pad surface fluctuating.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.